Deposition within a fusor

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Richard Hull
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Deposition within a fusor

Post by Richard Hull » Thu Oct 05, 2017 3:03 pm

I was rooting around among some old images of fusorIII taken in 1999 and found a good shot of the so called "lozenge" shape depositioning on the fusor walls within a complex structured grid fusor. The image shows this rather strikingly. When dis-assembled, this patterning is most interesting. I think I was using a tantalum or hafnium grid at that time. Thus, this would be the deposition material. I thought I would share it.

As usual, click to enlarge.

Richard Hull
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Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

prestonbarrows
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Re: Deposition within a fusor

Post by prestonbarrows » Tue May 22, 2018 4:20 am

Have you fooled around with srim for these materials, energies and currents? Do those sims match up with what you see?

Are you saying you saw a 'positive' grid pattern on the walls (lines) or a 'negative' one (spots)?

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Richard Hull
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Re: Deposition within a fusor

Post by Richard Hull » Wed May 23, 2018 4:43 am

The patterns are mere permanent depositions on the chamber walls miming the shape of the respective grid openings, based on beaming patterns.

Not a big deal at all and to be expected with higher current drives over long periods. In the past other have posted images of the fixed patterns of depositions like these once they opened the chamber up. I think my image above is the only one posted with the beams and lozenges visible in a working fusor.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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